Forget Hatfields & McCoys. This is an American feud for the modern age.

The World Series finds Newsroom star Jeff Daniels and comedian Kevin Pollak at odds, and they’re airing their grievances with each other using—what else?—Twitter.

Daniels, an avowed Detroit Tigers fan, and San Francisco Giants’ devotee Pollak have been tweeting about their respective teams during the games. But somewhere along the way things got ugly between the men, and the results have been hilarious.